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PDF PT8A3252 Data sheet ( Hoja de datos )
| Número de pieza | PT8A3252 | |
| Descripción | Ceramic Heating Controller | |
| Fabricantes | Pericom Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PT8A3252 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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PT8A3252/54
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5LED Ceramic Heating Controller
Features
Description
Pulse trigger with high current for SCR
Quickly Heating-Up and Quickly Lost-Heat-
Recover
External Adjustable to fit wide range heating plates
External Adjustable to different TCR of sensors
Full temperature compensation and insensitive to
environment temperature
5 Heat Temperature Settings
Auto power off (only for PT8A3252)
Over Temperature protection
DIP-16 and SOIC-16 packages
Applications
Ceramic Heating Controller
High watt density Alumina Heaters
The PT8A3252/54 is specially designed for ceramic
heating control with 5 internal level of 130C, 145C,
160C, 175C, 190C. And the temperature range can be
adjusted from 100C to 250C by external series
resistance. It can drive SCR directly and detect heater
temperature by heater-self without extra temperature
sensor. It has 3 keys for function setting, 5 LEDs for
working status indication. The PT8A3252 has an
internal timer; it timeouts and device will stop heating
automatically after 216000 clock period, ie. 1 hour for
60Hz and 1.2 hour for 50Hz. The circuit of Over-Heat
Protection will be working for safety when heater
temperature reached to 250C. The chip is packaged in
lead free DIP-16 and SOIC-16.
Pin Configuration
L4 1
C1 2
C2 3
REF2 4
REF1 5
PTC 6
GATE 7
OT 8
PT8A3252/54
16 L3
15 L2
14 L1
13 VDD1
12 VDD2
11 VB
10 GND
9 CLK
12-07-0006
PT0233-1 07/06/12
1
1 page  
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PT8A3252/54
5LED Ceramic Heating Controller
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Functional Description
3 Input Buttons
On/Off: This button will toggle Heating-on or
Heating-off. Once heating-on, the level 1 of 130C
temperature setting always be selected.
Up: Temperature up adjustment button. Push Up-
button once, the temperature setting increases one
level until the highest level 5 is reached.
Down: Temperature down adjustment button. Push
Down-button once, the temperature setting reduces
one level until the lowest level 1is reached.
Reset
After power on the chip will be reset by internal POR
circuit, LED1~ LED5 are all disabled. GATE and OT
PIN output are low level.
Timer (only for PT8A3252)
Once IC enters Heating-on state, internal timer starts to
count. It timeouts and device will stop heating
automatically after 216000 clock period, ie. 1 hour for
60Hz and 1.2 hour for 50Hz.
5 LED Indicator (Internal)
LED1: 130C temperature setting (level 1)
LED2: 145C temperature setting (level 2)
LED3: 160C temperature setting (level 3)
LED4: 175C temperature setting (level 4)
LED5: 190C temperature setting (level 5)
Note: The temperature range can be adjusted from
100C to 250C by external series resistance.
Over-Heat Protection
Once heater loses control and reaches to 250C, the
Over-Heat protection function will be activated by
driving one SCR to melt the fuse immediately.
Application Circuit
0.47~2.0K
8.2~16K for 110V
5.6~12K for 220V
100
Level 1
RS1 39K
RS2 10K
Level 2
10K
10K
Level 3
10K
39K
RA, RB: Temperature adjustment.
RX: Overshoot adjustment.
RS: Recover sensitivity adjustment
RS1
RS2
12-07-0006
PT0233-1 07/06/12
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet PT8A3252.PDF ] | |
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